If you use a b18 block with a b20 head, wouldn't this lower compression?
I know that if you use b16 head on a b18 you increase compression which gives more power, if you go the other way my guess is that you will loose power.

ok, so i got a b18c1....na........kinda stock (just got the motor in) Intake header exhaust, kinda thinkin about JRSC, and hondata of course, but you say, if i get a b16 head, i get more power?.....eh? if you dont mind, could u explain a little?